package com.winphone.uavc.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;

/**
 * @author: zhou
 * @Description:
 * @Date:Create in 2018/01/13
 * @Modified By:
 */

public class PropertyUtil {

    private static final Logger logger = LoggerFactory.getLogger(PropertyUtil.class);
    private static Properties props;
    static{
//        loadProps();
    }

    /**
     * 读取文件 静态变量
     */
    synchronized static private void loadProps(){
        logger.info("开始加载properties文件内容.......");
        props = new Properties();
        InputStream in = null;
        try {
//                    <!--第一种，通过类加载器进行获取properties文件流-->
            in = PropertyUtil.class.getClassLoader().getResourceAsStream("xxx.properties");
//          <!--第二种，通过类进行获取properties文件流-->
           //in = PropertyUtil.class.getResourceAsStream("/jdbc.properties");
           props.load(in);
        } catch (FileNotFoundException e) {
            logger.error("jdbc.properties文件未找到");
        } catch (IOException e) {
            logger.error("出现IOException");
        } finally {
            try {
                if(null != in) {
                    in.close();
                }
            } catch (IOException e) {
                logger.error("jdbc.properties文件流关闭出现异常");
            }
        }
        logger.info("加载properties文件内容完成...........");
        logger.info("properties文件内容：" + props);
    }

    public static String getProperty(String key){
        if(null == props) {
            loadProps();
        }
        return props.getProperty(key);
    }

    public static String getProperty(String key, String defaultValue) {
        if(null == props) {
            loadProps();
        }
        return props.getProperty(key, defaultValue);
    }

    /**
     *
     * @return
     */
    public static Properties readProperties(){
       //指定文件
        String filePath = "appversion.properties";
        Properties props = new Properties();
        InputStream in = null;
        try {
            in = PropertyUtil.class.getClassLoader().getResourceAsStream(filePath);
            props.load(in);
        }catch (FileNotFoundException e) {
            logger.error("appversion.properties文件未找到");
        } catch (IOException e) {
            logger.error("appversion.properties读取失败");
        }finally {
            try {
                if(null != in) {
                    in.close();
                }
            } catch (IOException e) {
                logger.error("appversion.properties文件流关闭出现异常");
            }
        }
        return props;
    }
}
